sql - 从 sqlplus 查询中选择顶部行

Question

我有一个问题

select sum(pur.purchase_net_invoice_value), par.party_desc  from purchase pur
join party par
on par.party_id = pur.party_id
group by par.party_desc;

运行良好。

我只想获得查询的前五行并丢弃其他行。

Answer 1

您可以为此使用 rownum 伪列:

SELECT * 
FROM (SELECT   SUM(pur.purchase_net_invoice_value), par.party_desc
      FROM     purchase pur
      JOIN     party par ON par.party_id = pur.party_id
      GROUP BY par.party_desc
      ORDER BY 1 DESC)
WHERE rownum <= 5;